A 0.16 kg billiard ball traveling at 6.0m/s collides head-on with the 0.17 kg cue ball moving in the opposite direction at a velocity of – 9.0 m/s. The billiard ball moves away at – 12m/s after the collision. Find the velocity of the cue ball.

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Q: #5

A: Write the expression for conservation of momentum

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